Duplicate of A026136.

Terms

a(0) =1a(1) =3a(2) =2a(3) =7a(4) =9a(5) =4a(6) =5a(7) =15a(8) =6a(9) =19a(10) =21a(11) =8a(12) =25a(13) =27a(14) =10a(15) =11a(16) =33a(17) =12a(18) =13a(19) =39a(20) =14a(21) =43a(22) =45a(23) =16a(24) =17a(25) =51a(26) =18a(27) =55a(28) =57a(29) =20